20205112 has 64 divisors (see below), whose sum is σ = 42768000. Its totient is φ = 8902656.

The previous prime is 20205103. The next prime is 20205121. The reversal of 20205112 is 21150202.

It is an interprime number because it is at equal distance from previous prime (20205103) and next prime (20205121).

It is a junction number, because it is equal to n+sod(n) for n = 20205092 and 20205101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185314 + ... + 185422.

It is an arithmetic number, because the mean of its divisors is an integer number (668250).

Almost surely, 2^20205112 is an apocalyptic number.

It is an amenable number.

20205112 is an abundant number, since it is smaller than the sum of its proper divisors (22562888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20205112 is a wasteful number, since it uses less digits than its factorization.

20205112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20205112 is about 4495.0096774089. The cubic root of 20205112 is about 272.3665401518.

Adding to 20205112 its reverse (21150202), we get a palindrome (41355314).

It can be divided in two parts, 2020 and 5112, that multiplied together give a triangular number (10326240 = T₄₅₄₄).

The spelling of 20205112 in words is "twenty million, two hundred five thousand, one hundred twelve".